Update EscapeExternalHandlerValue to keep '#', '[', and ']'

chrome/chrome_browser.gypi

 # Copyright 2012 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 {
   'variables': {
     # All .cc, .h, .m, and .mm files under browser except for:
     # * tests and mocks.
     # * code below browser/chromeos
     # * code below browser/extensions
@@ skipping 93 matching lines @@
       'browser/android/tab_android.h',
       'browser/android/tab_load_status.h',
       'browser/android/thumbnail/thumbnail.cc',
       'browser/android/thumbnail/thumbnail.h',
       'browser/android/thumbnail/thumbnail_store.cc',
       'browser/android/thumbnail/thumbnail_store.h',
       'browser/android/uma_bridge.cc',
       'browser/android/uma_bridge.h',
       'browser/android/uma_utils.cc',
       'browser/android/uma_utils.h',
+      'browser/android/url_sanitize_utils.cc',
+      'browser/android/url_sanitize_utils.h',
       'browser/android/url_utilities.cc',
       'browser/android/url_utilities.h',
       'browser/android/voice_search_tab_helper.cc',
       'browser/android/voice_search_tab_helper.h',
       'browser/android/webapps/single_tab_mode_tab_helper.cc',
       'browser/android/webapps/single_tab_mode_tab_helper.h',
       'browser/app_controller_mac.h',
       'browser/app_controller_mac.mm',
       'browser/app_icon_win.cc',
       'browser/app_icon_win.h',
@@ skipping 3476 matching lines @@
           'variables': {
             'proto_in_dir': 'browser/sync_file_system/drive_backend',
             'proto_out_dir': 'chrome/browser/sync_file_system/drive_backend',
           },
           'includes': [ '../build/protoc.gypi' ]
         },
       ],
     },],
   ],
 }